It is undeniable that some very useful analogies can be drawn between the relational systems of computer mechanisms and the relational systems of brain mechanisms. The comparison does not depend upon any close resemblance between the actual mechanical links which occur in brains and computers; it depends on what the machines do. Furthermore brains and computers can both be organized so as to solve problems. The mode of communication is very similar in both the cases, so much so that computers can now be designed to generate artificial human speech and even, by accident, to produce sequences of words which human beings recognize as poetry. The implication is not that there is no sharp break of continuity between what is human, what is mechanical.
(CAT 1990)
The resemblance between the human brain and the computer is